GPU cores are not real cores so I am not sure your count makes sense :)

> I installed first HWLOC 1.7 version and I also installed the newly
> released beta 1.8. The final installation lines report PCI (linux) CUDA.
> However, the commands:
>
> Lstopo ---whole-system and lstopo ---whole-io
>
> report only the 8 CPU-cores. No reference to PCI-Bridges, eth0, seas
> +++ and the GPUs.
>
> Is the installation of the machine the problem or is my
> ./configure ---prefix=/usr/local/hwloc
>
> missing some vital elements?

What kind of Linux distribution and what kernel version is this?

Please run "hwloc-gather-topology --io myname" (from hwloc 1.8) and send
the corresponding myname.tar.bz2 that it will create.
Note that this command may be a bit slow. Also the generated tar.bz2 may
be big, so feel free to send it to me only since it may well be rejected
by the mailing list.